Pure merino knit
The 100% merino wool knit combines midweight warmth with airflow for changing effort levels.
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Coreline AR Merino Quarter-Zip Baselayer
In the field
A midweight 100% merino wool baselayer with a quarter-zip neck for quick temperature control.
Quarter-zip control
The quarter-zip neck opens for fast venting and closes for more coverage without removing layers.
Athletic layering fit
A stretchy next-to-skin fit keeps bulk low under a shell. Size down for a tighter fit.
Construction and materials
- Material
- 100% merino wool
- Fabric class
- Midweight
- Closure
- Quarter zip
- Fit
- Next-to-skin athletic fit
- Fit advice
- Size down for a tighter fit
- Stretch
- Four-way stretch
- Sleeves
- Long
- Fabric features
- Breathable, moisture-wicking, quick-drying, odor-resistant and temperature-regulating
- Color options
- Blue, Black
- Size options
- S, M, L, XL, 2XL
- Size chart scope
- Reference body chart XS–4XL; only selector choices are purchase options.Body measurements, not garment dimensions; sleeve measured from center back of neck to wrist
- Chart fit advice
- Between sizes, size up for a relaxed fit
This is the layer that starts the whole system. 100% merino wool. Midweight warmth with a 1/4 zip to dump heat on the move. Odor resistance, breathability, and moisture control—locked in.
Key Features
-
100% Merino Wool knit construction
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Midweight build: balanced warmth + airflow for mixed-output days
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1/4 Zip Neck for fast temperature regulation without stripping layers
-
Breathable + moisture-wicking performance to manage sweat spikes
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Odor-resistant merino for multi-day wear and repeat laps
-
Next-to-skin, athletic fit with high stretch (size down for a tighter fit)
Recommended Use
Wear it solo for cold-weather training, or run it under a shell for ski days and windy ridgelines. Zip up for the chairlift. Zip down when the climb turns savage.
Bottom Line
Merino heat. Zip control. Zero excuses.
Men's Tops — Size Chart (XS–4XL)
Measurements reflect body measures, not garment dimensions. If between sizes, size up for a relaxed fit.
| Size | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Sleeve* (in) | Sleeve* (cm) |
|---|---|---|---|---|---|---|
| XS | 32–34 | 81–86 | 26–28 | 66–71 | 31–32 | 79–81 |
| S | 35–37 | 89–94 | 29–31 | 74–79 | 32–33 | 81–84 |
| M | 38–40 | 97–102 | 32–34 | 81–86 | 33–34 | 84–86 |
| L | 41–43 | 104–109 | 35–37 | 89–94 | 34–35 | 86–89 |
| XL | 44–46 | 112–117 | 38–40 | 97–102 | 35–36 | 89–91 |
| 2XL | 47–49 | 119–124 | 41–43 | 104–109 | 36–37 | 91–94 |
| 3XL | 50–53 | 127–135 | 44–47 | 112–119 | 37–38 | 94–97 |
| 4XL | 54–57 | 137–145 | 48–51 | 122–130 | 38–39 | 97–99 |
*Sleeve measured from center back of neck to wrist. 1 inch = 2.54 cm.
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FAQ
How can I reach Alpine Extreme if I have questions?
Email [email protected] or use our contact form.
Do you offer free shipping?
Free standard shipping is available to most addresses worldwide. Availability, delivery estimates, and any expedited charges depend on the destination and order. International duties, tariffs, and customs fees remain the customer’s responsibility. See our Shipping Policy for details.
What's the return policy at Alpine Extreme?
Eligible return or exchange requests must be submitted within 45 days of the order date. Items must be new and unused with original packaging, tags, and accessories. General change-of-mind returns are not accepted. Return-shipping responsibility depends on the reason for the return. See the full Return & Refund Policy for exclusions and refund timing.
How long will it take for my order to arrive?
Orders are typically processed within 2–5 business days. Most standard shipments arrive within 7–14 business days after shipping, depending on destination and carrier conditions. Delivery estimates are not guaranteed.
Can I track my order?
Yes. Tracking details are emailed after shipment. You can also check order status with your order information through our order-tracking page.
What if there's an issue with my order?
Email [email protected] or submit the form on our support page. Report delivery issues within 60 days of the order date so carrier information is still available.
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